What are the VIP Levels and what does bonuses does each one grant me?

Hello,

I am VIP level 4 but there is nowhere in the app that I can find that shows me what each VIP level does and how to get to each level. I believe we should get bonuses each week like Heroes Evolved for being VIP and also frames and stuff. Can you give me more information about VIP so I know if it's worth it? Thanks